If wireless is bad for us (my acupuncturist homoeopath told me it was, so it must be true) and that works in the GHz range - so surely something that works in the THz range must be a thousand times worse for us?

How long before the luddites suggest something like that?

On a more serious note, any wireless system that is capable of working through my 2 foot thick walls would be very welcome by me. It's a shame that we're probably at least 5 years away before a viable commercial version is available...

The problem with getting workable solutions at this frequency is that it gets much harder to have a reasonable output power, which means short range. One of the other main problems is tuning which involves tailor made parts and lots of testing/retuning to get right (although that's going on my experience of top end R&D equipment so it may be that they've cracked it for lower/consumer parts).

oh well threw some numbers into a modeler.. you could theoretically get 4x the distance using a small 3 element yagi =] but the f/b ratio is horrible not to mention the pattern, needs a lot of tweaking.. least the numbers put it in the ballpark though